肇論新疏 3.127

3.127

承前經意以辨。前云佛如虛空隨緣而現，故云在天下。謂應無不周、與體同遍。寂寞下，顯非聲色。身非執受，故二執永無；故竟諍也，無諍是涅槃故。導而下，因感而導，疾前無藥故。

Taking up the preceding meaning of the sūtra to distinguish this: earlier it stated that the Buddha is like empty space, manifesting in accord with conditions; therefore it says 'in the world.' It means his response leaves nothing unreached, being universally pervasive just as the body is. From 'silent, serene...' onward, it reveals that he is neither sound nor form. Since the physical body is not appropriated as self, both grasping forms of clinging are forever non-existent; hence he does not contend, for non-contention is nirvāṇa. From 'he guides...' onward, he guides due to evocative resonance; before an illness manifests, there is no medicine.